Loom knockoff means



Nov. 10, 1953 Filed June 23, 1950 F. F. DCNOGHUE ET AL LOOM KNOCKOFF MEANS N Fen (\l m C0 C0 (0 4 Sheets-Sheet l INVENTOR.

f L O/EENCE E Don/0 GHUE y HARE/JON NTH/BAULT 464 @fwifif ATTORNEY Nov. 10, 1953 F. F. DONOGHUE ET AL LOOM KNOCKOFF MEANS 4 Sheets-Sheet 2 Filed June 23, 1950 INVENTOR. FLORENCE DONOGHUE BY HARP/50H /v. THIBAULT Mm M m 7- ATTORNEY Nov. 10, 1953 F. F. DONOGHUE ET AL ,658, 34

LOOM KNOCKOFF MEANS 4 Sheets-Sheet 3 Filed June 25, 1950 jNVENTOR. FLORENCE FDONOGHUE y mere/501v N. TH/BAULT AT TOEN E Y Nov. 10, 1953 Filed June 25, 1950 F1 F.[)CHQC)GH4LJE ET'AL LOOM KNOCKOFF MEANS 4 Sheets-Sheet 4 104 INVENTOR.

FLORENCE F DONOHUE 3y HARRISON N. TH/BA ULT AWTTOBAHEY Patented Nov. 10, 1953 UNITED STATES PATENT OFFICE- LOOM KNOCKOFF MEANS ration of Maine Application June 23, 1950, Serial No. 169,818

19 Claims.

This invention pertains to improvements in looms, and more specifically, to improvements in stop motions for looms.

It is a general object of the invention to provide improvements in stopping mechanisms for looms which shall render the entire stopping means more effective and much simpler in its construction thereby facilitating assembly and maintenance of the parts and permitting their production at a reduced cost.

It is a more specific object of the invention to provide improvements for a stop motion mechanism by which it may function through a common element to convey the stopping impulses from both the filling and the warp stop indicating means to the knock-off means thereby to discontinue power and to apply a brake.

A further object of the invention is that of providing an improved and simplified stopping means which may function from a lay carried filling stop motion and which is adapted to be moved to knock-off position by certain parts carried by the lay and to provide for employing only a small part of the movement of the lay for quickly completing the knock-off function, and then permitting additional movement of the lay to take place without affecting the stop motion parts, and coincidentally providing for stopping the lay and other loom parts at a specific and predetermined point.

It is a further but not exclusive object of the invention to provide improvements for a stop motion to interconnect it to a knock-011 means adapted for use in the control of certain power and braking units in which the common control exercised on the combined power and brake mechanism is applied through a single interconnecting link or other means.

Other objects will become apparent from the following more detailed disclosure.

In looms of the type described it is customary to provide a knock-off lever or levers generally located adjacent the front of the loom and these are movable to an extreme position for starting the loom by engaging a clutch or in some manner starting and interconnecting a power means to the functioning parts of the loom itself, and at the same time, releasing a brake which is normally applied during that period of time which the loom is stopped. This knock-off means or knock-off lever is also employed for stopping the loom by disengaging the clutch or in some other manner rendering the power unit ineffective and applying a brake. There is also a so-called neutral position in which the power is disconnected and the brake released, that being advantageously utilized when it is desired to turn the mechanism by the hand wheel incidental to repairing broken filling or warp threads or performing some other duty at the loom preparatory to starting it again.

While the stop motion herein described and claimed is applicable to all looms and to various types of power and brake means which may be used on those looms, it is especially adapted for use with those looms powered by one of the newer units which essentially comprises a combined motor and brake which are controlled by a single controller element to be set in any one of three different positions. In one position the motor is started and is geared through to the loom parts to be driven thereby and the brake is released. In the opposite extreme position the power is disconnected and a brake applied for stopping the entire loom in a relatively short period of time and while the parts themselves move only a relatively short distance beyond that point at which the indication for stopping occurred. In the third position the power is disconnected and the brake released, this position hereinafter being referred to as a neutral position.

Units of the type above mentioned are controllable through a single lever or other controller and the various driving and braking combinations are obtained by movement of that lever through a link and interconnected parts to three different positions. While the preferred form of the invention as hereinafter described in detail and the advantages attendant upon the mechanism are particularly adapted to be used with looms powered as above described, they are not limited in that respect and, in fact, the stop motion may be employed with various types of motor drives and with brake meaans which either function as a part of the driving mechanism and are controlled coincidentally therewith, or which are more or less separate therefrom.

According to the invention, a pivoted lever and attendant novel parts are employed as a means upon which the indications of the filling and warp stop motions are applied or by which they are received, and this lever is in turn interconnected to the knock-01f levers, or at least one of the: so that indications imparted to the pivoted lever are in turn applied to the knock-on mechanism and through that to the power and brake unit or units. This lever is of rather peculiar construction as will hereinafter be described, but has releasably connected thereto a hunter or other reciprocating member which is normally inactive once the loom has been started and re mains so until an indication of a filling break occurs. After starting the loom the hunter is automatically elevated to a position so that its free end is in line with a part on the lay of the loom which normally clears the said end of the hunter unless a filling failure is indicated, but in that event contact is made and the hunter moved throughout a predetermined extent depending on the residual movement of. the lay in the direction of its front center position during which movement the said pivoted lever is swung away from that position which it occupies during loom operation. Since it is interconnected to a knock-off or shipper lever it swings that lever to the extreme position for effecting knock-off or discontinuance of power to the loom and coincidental application of the brake.

This bunter being releasably engaged with the lever affects the latter only during a portion of the residual forward stroke of the lay thereby effecting knock-off of the loom very quickly, and after that, it becomes disengaged as will hereinafter be explained in detail during which time it is. pushed forwardly independently of the lever to a point as determined by the extreme forward movement of the lay. A resilient means forms a part of the dagger and lever combination and may be so constituted or set as to influence the. forward movement of the lay and incidentally other parts of the loom thereby to provide for stopping at a predetermined point.

The pivoted lever serves a dual function in that it is also independently contacted and affected by certain warp stop mechanism whenever one of the warp threads fails. The said warp stop mechanism includes a normally inactive, but reciprocable member one end of which engages a portion of the lever and the other end of which carries a pivoted detent or other equivalent means normally maintained out of the pathway of a cam adjustably fixed to a constantly rotating part of the loom, but movable as will hereinafter be explained, upon indication of a warp thread failure, to enter the pathway of that 'cam and to be affected thereby in knocking off the loom through the said pivoted lever.

A separate controller at the forward pivot point of that link which interconnects the knockoff lever and the pivoted lever is employed. for moving the parts to the so-called neutral position and the details thereof will be explained inthe following more extended description.

The invention is hereinafter described in detail by reference to one specific and preferred em bodiment of the same as illustrated in the accompanying figures of drawing wherein:

Fig. 1 is a perspective view of the left hand end of a loom to which the stop motion which is subject matter of the invention has been applied.

Fig. 2 is a similar view taken at the same end of the loom, but showing the parts. to an enlarged scale and in the position which they occupy when the loom is started at the first pick.

Fig. 3 is a top perspective view showing the parts as applied in Figs. 1 and 2 and the general arrangement thereof with respect to the other and more conventional loom mechanism.

Fig. 4 is a perspective view of a part of the right hand end of the loom showing the opposite knock-off or shipper lever and the connecting link running therefrom back to the power and brake unit.

Fig. 5 is a perspective view to a scalesmaller than that employed in Fig. 4, but showing the other end of the said link and the attendant mechanism by means of which the power and brake unit are controlled.

Fig. 6 is a detail perspective view showing a cam and a detent controlled by the warp stop motion which cooperate to convey a warp stop indication through to the other stopping parts at the front of the loom.

Fig. 7 is a detail view showing the stop'motion parts in the position which they occupy during running of the loom and after the first pick.

Fig. 8 is a corresponding view of the parts at completion of knock-off, but before the lay has advanced farther toward front center.

Fig, 9 is a detail view showing the controller element for effecting the neutral setting and the parts in that position.

Fig. 10 is a detail view showing certain of the parts.

Figs; 11 and 12 are further detail views showing the manner in which the warp stop cam is adjustably connected to a rotating element at the loom.

Now referring to the figures of drawing and especially to Figs. 1, 2 and. 3, the loom to which the stop motion has been applied includes among other parts, a loomside 20, a lay end generally indicated by numeral 2!. and attached at the outer end of a lay beam. 22 which is affixed at the upper ends of the usual swords one of which is indicated by numeral 23 and which is reciprocated by the usual crank and pitman mechanism common to looms of this type. A hand rail 24 is fixed to the swords above the lay and a reed (not shown) between the hand rail. and. the lay serves to beat. up the. fabric in theusual way.

A plurality of harness frames 25 are reciprocated vertically by harness mechanism ofconventional type and through heddles 26. forming a part of these frames, the warp threads are threaded and are controlled toform the shed through which the shuttle 21 passes during theformation of fabric.

A picker stick 28 at the left hand end of the loom is actuated by the usual picker mechanism and is governed or controlled by a check strap 29, it being understood that the lay ends, picker mechanism and check straps are duplicated at the opposite end of the loom.

A hand wheel 30 is fixed to the end of the crank shaft 3| and may be employed for turning the loom over slowly by hand when the power has been disconnected and the brake released.

A bracket 32 is bolted rigidly to the. forward upper part of the loomside 20 and carries a filling feelergenerally indicated by numeral 33 and which need not be described in detail since it is of conventional construction. This feeler when the supply of filling carried by a shuttle has become substantially exhausted functions through the wire rod 34 to control a replenishing means by which the supply of fillingv is renewed.

Adjacent the front of the m the completed fabric is taken up and is wound on a fabric roll, the fabric take-up mechanism being advanced periodically by means of a feed pawl 35 pivoted on a feed pawl arm. 35 and functioning on a.

ratchet wheel 31, return movement: of the: wheel being prevented by a stop pawl. 38 pivoted at. 39 at the front of the loomside. A hand wheel-'40.- attached to the same shaft to which ratchet wheel 3! is fixed serves to advance or to turnin a reverse direction, the fabric take-up mechanism, as is sometimes done by hand when the loomis stopped, this being well understood by those conversant with the weaving art.

Now referring to Fig. 5, the loom is driven by a power and brake unit generally indicated by numeral 4| which is mounted on a bracket or other suitable supporting means 42 at the right hand end of the loom. It is not necessary to go into the details of this power and brake unit other than to say that it is one of several which may be employed and all of which have a driving motor and a brake enclosed within a housing and which are controlled by a single lever or control means 43 movable to three different positions in one of which the power is interconnected through to the loom and the brake release, a second or opposite condition at which the power is disconnected and the brake set, and a third or neutral position at which time the power is off and the brake released at the same time. This power unit drives the loom through various gears or other means the details of which are now a part of the prior art and which need not be described here.

The control for starting and stopping the loom comprises at least one shipper or knock-off lever 44, Figs. 1 and 2, which is fixed at one end of a knock-off shaft 45 which extends through bearings it and all to the front opposite end of the loom and preferably has attached or fixed thereto a second lever 48 at the right hand end. Either of the levers 44 or 48 may be employed to control the loom and they function through a link 49 pivoted at st to the lower forked end of arm 5! which is in effect a continuation of the lever 4s and disposed at the opposite side of the pivot or knock-off shaft 45.

This link or rod 49 extends rearwardly and, as shown in Fig. 5 wherein it appears to a smaller scale, connects to one arm of a bell crank lever 52 pivoted in such position as to have one of its arms align with the lower end of the controller 43 for the unit 4|. A second link or rod 53 is connected between that arm of the bell crank lever and the said controller 43. A spring 54 normally tends to urge the parts in one direction and to move them to the inactive or knock-off position. Accordingly, movements of either of the levers 44 or 4% will control the motor and brake unit 4!. As it is specifically arranged according to the present illustration, the lever 44 when pushed rearwardly or toward the lay of the loom moves the controller 43 in such direction as to disconnect the power and to apply the brake. Movement forwardly or in the opposite direction starts the loom, and a slight movement from the position of Fig. l in the direction of starting the loom releases the brake, but does not apply the power. This latter position corresponds to that above mentioned and referred to as the neutral or brake-off position at which time the loom may be turned by the hand wheel til.

Now referring to Figs. 1 and 2, the stop motions, one incidental to failure of weft and the other functioning upon failure of a warp thread or threads, are so disposed and the intermediate mechanism between those stop motions themselves and the knock-off means is so arranged that both function to control the knock-off by levers 4 and it? through a second or intermediate control lever generally indicated by numeral .55 and pivoted at 5%, the latter being a stud fixed at the loomside or at the bracket 32, or in fact, to any other suitable fixed portion of the loom which is closely adjacent and properly aligned with the knock-off lever 44 so that the lever 55 may be interconnected thereto by a short link The link 56' connects at one end to the forked upwardly extending portion of the lever 55 by a connecting pin ill and to the knock-off lever 44 by a projecting pin or stud 58, the arrangement being such that the arm of the lever 55 above the pivot is considerably shorter than the length of the corresponding arm above the knock-off shaft 45 at which the link 56 is attached thereto by passing about stud 58. The link 55 is extensible and provides for an adj ustment between the two levers by its turnbuckle 59 and the usual locking nuts, it being understood that any other suitable adjusting means may be employed.

First taking the portion of the stop motion which functions upon failure of filling, rocking of the lever 55 may occur after an indication of filling failure from any one of the well known center or end fork mechanisms adapted to sense the presence or absence of filling at those positions and to convey an indication to other parts in the event filling is not present as it should be. As herein illustrated, the filling feeling mechanism comprises a so-called center filling fork such as that shown and described in U. S. Patent 1,865,930 and which, therefore, need not be shown in greater detail here. According to the patent, a contact element carried by a swinging arm adjacent one end of the lay is positioned to engage other parts in the event filling is absent, but will always be withdrawn if filling has been laid in the shed as intended. As modified for the present construction, a rod 60, Figs. 2 and 3, corresponds to the rod which controls the swinging lever and contact member of the patent above mentioned and projects through a bearing member El to extend outwardly therefrom sufficiently so that its pathway ma intercept the free or rear end 62 of a hunter 63 which is normally controlled so as to remain inactive except as the said rod contacts it in a manner hereinafter to be described in greater detail.

This bunter 63 is guided at one end by the arms 64 of the lower forked end of the lever 55 and the actual form taken by this hunter as illustrated comprises a part of more or less rectangular cross section and a forwardly extending part of reduced size and which is preferably somewhat circular. The forwardly extending part 65 is also offset to form a shoulder 66 and an upper curved portion 6'! at the end of which is a cross piece $8 the rearwardly directed surface of which is somewhat rounded. This forwardly extending part 65 of the hunter projects through the space between the arms 64 and is supported upon a cross pin 69 against which the shoulder 66 bears when the parts are in the position they occupy at Fig. 2, that is, the running position.

The rear or rectangular portion of the hunter is guided within a slot formed between the downwardly projecting guides 10 and 1 i. These guides permit movement of the rectangular portion of the hunter and means further illustrated in Fig. '7 shows the manner in which the hunter is prevented from rising to too great a height and by which it is also prevented from reaching a position to be contacted by the projecting end of the rod til at the first pick during starting the loom. A spring 12 bearing against the lower horizontal edge of the slot formed between guides 10 and TI and tensioned in an upward direction normally urges the hunter to its uppermost position. This spring i2 is also connected at its forward end to the lower end or pivot point 13 of the fork arms d4 of the ivoted lever.

Now referring to Fig. 7, a stop screw '14 is adjustably threaded in the bracket 32 and is assassins.

locked in position by a locking nut or by any suitable. means. The hunter may rise only'to a position where the lower end. of'this' stop screwis: contacted by a raised boss atthe forward outer part of the rectangular portion of the hunter, and by properly adjusting this screw H the position of the rear endof thehunter may he so regulatedthat it will be contacted by the outer protruding end of rod 60' in theeventthat rod, affected by the center fork if filling.- is; not present in the usual manner; does actually make contact with the hunter to knock off. the loom.

A spring 15 which may actually extend into an annular space inside the rectangular portion of the hunter 63 serves to position it rearwardly with. respect to. the lever 55 when the loom is started or in running. position. The forward. end: of. this spring bears against awasher 76 of greater diameter than the space between. the arms 64- at that oint. That spring, also has con'- siderable strength and tendency to extend. and. thus: serves the dual function of moving, the hunter parts as just above described and also: permitting additional movement of thoseparts after the loom is knocked off.

The cross member serves'to limit rearward movement of the hunter and also, when the loom is to be knocked 01f and the hunter. moved. for wardly' to impart. a. rocking movement of lever 55, the curved cam surfaces Ti and E8: of. the downwardly extending arms 64 arriveat a, more acute angle with respect to the horizontal and. serve to cam. and to elevate that end. of the hunter. to disengage the shoulder 86 from. the crosspin 653. This action is timed to. he completed just after the loom: will have been knocked off by. moving shipper lever M to its. more or less extreme position rearwardly,v and preparatory to a more extended movement of the hunter forwardly without a corresponding movement of the rocking lever 55. The indicationof filling failure and. the initial actuation of the weft stopping parts occurs. before the lay has moved quickly, the hunter must move an additional.

distance since it is still being pushed. forwardly by the end of rod 69 and the lay. That move.- ment is cushioned and resisted by the spring. 16' after disengagement of the shoulder Eli-with. the cross pin 69'.

During the first pick upon restarting. theloom, it. is possible that the center fillingforkor. other. filling fork by means of which the rod. 60 or. equivalent is interposed. in the. pathway of. the end of hunter S3 will encounter no filling, to prevent its continued operation inthe direction. ofv stopping the loom until the. second. pick. of weaving. For that reason and to prevent immediate knocking off of the loom after restarting, a pivoted. detent is, Fig. 7, is provided and may assume a more or less vertical position thereby to bear against the upper surface of the rectangular' portion of the" hunter, as illustrated Fig. 2. In that position, the hunter is held downwardly so that its end is not in the path of the end of the rod 8e and therefore the filling stop mech-- anism is virtually inefiective for the-firstpick after restarting the loom.

As the loom is stopped, the forward movement imparted. to the hunter causes the rectangular portion thereof to slip forwardly beneath. pivoted detent l9 and at that time, the detent assumes an angular relationship. Fig. 1. Upon rearward movement the detent takes a vertical position. and presses the hunter downwardly beyond-the point which. it might normally occupy when governed by the stop screw T4 only. As the partsare reset upon starting, Fig. 2 illustrating. that position, the detent will still he in vertical position. holding the hunter downwardly and. that. condition prevails until the lay has movedato its. forward position for the first beatup: movement after starting at which time an abutmentin the: form of an adjustable screw threaded'iinto' aportionv of the layer part carried" thereby: strikes against the rear face of the detent Hlpushing it forwardly to slip from the rectangular part. thereof and to assume a positime such as that shown in Figs. 1 and 7. In that position: the spring "becomes effective for lifting the hunter. to its-uppermost position. as governed. by the adjustable stopscrew 14- and thus after the first pick the parts are set so that upon the first indication of filling failure the stopping function will. be effected.

Now referring to Figs. 1 and: 6, those parts which-function upon indication of a warp thread hreah will be described. The warp threads are passed. through the usual warp stop motion illus trated in detail. in U. 8.. Patent 1,719,262, and which. therefore, neednotbe shown or described here. Indications from a warp stop mechanism of the type. shown in the patent are. conveyed through a Bowden wire cable or other mechanical means, inthe event the'stop' motion is of a mechanical type, and one end of such a cable is illustrated at 8| in these figures. A plunger 82 projecting. from the end. of. that cable which is incidentally locked or retained in a bracket 83 at the side of the loom is so positioned and controlled as to engage beneath a pivoted detent 84 which is hinged at 85 to a rod end 85 which is" adaptedv to move in a substantially straight line movement as it. is pivoted upon. relatively long swinging arms-. 81. The latter are in. turn pivoted at 88, a stud projecting through a boss on the bracket 83,. and-have their movement limited as one contacts either end of anotch cut in. a lip as extending, fromsaid bracket.

This rod. end 86 is threadedto a rod. or motion-transmitting bar 90 which extends forward.- ly, of the loom and somewhat upwardly to pass through a guide hearing. at the lower end of the downwardly projecting guide 10, Figs. 1 and 2. The forward end of this rod. is aligned with and is. adapted. to contact an ear 9-1- which is formed integrally with the outer arm of the forked, lower part 64 of the lever 55. Normally when the loom is runningthere is a slight clearance between the end. of the-rod 9t: and ear 9|.

A cam 92 is attached to some constantly rotating part of the loom. mechanism, preferably, to the inner portion of the hub of the hand wheel 30 which. is attached at the end of the loom crank. shaft. Referring more specifically to Figs- 11' and. 12, this cam 92 isclamped. between a shouldered ring 93cand. the inner face of the hub Q4. of the hand. wheel by a plurality of. clam-ping screws or bolts 95-. Three such screws are illustrated. here, but. the number may vary according to individual design.

This cam 92. may be adjusted angularly for 360 with respect to the crank shaft by which it is driven and the fiat, more or less radial face 96 thereof. is soset as to engage the tip 91 of the pivoted deter-1t when that detent has been rocked aboutpivot 85 by the plunger 82, that occurring whenever the Bowden wire is moved in. accordance with the indication of a warp thread break or other failure at the warp stop motion proper adjacent the rear portion of the loom frame. The detent 8 may take various forms but, as here illustrated, has a top, forwardly projecting ofiset part at which limits its rocking movement to a few degrees, the two positions of the detent being illustrated in Fig. 6, the full line position being that in which the point or tip 9? clears the cam and the dot-and-dash line position bein that assumed upon indication of a warp thread break and so positioning the parts as to convey the cam movement through the rod 99 to the ear Qi and thereby to rock lever 55 about pivot 56 to knock off the loom in a manner similar to that which takes place when a filling stop causes the parts to function.

If the warp stop motion itself is of the electric type the movement of the detent 84 may then be effected through a solenoid or by some other means more appropriately associated with stop motions of that nature.

In addition to the stopping through failure of filling or of one or more of the warp threads, the loom is automatically knocked off whenever the protection mechanism thereof serves to stop the loom through the usual or conventional dagger and frog mechanism. While those parts are not illustrated, as shown in Figs. 1 and 2, at each end of the loom there is a rod 99 which projects through suitable guide openings in the rib liiil at the front of the loomside 2t and in a lower portion of the bracket 32 which is herein indicated at H, Fig. 2. The rearmost end of this rod is in contact with the movable frog and the forward end enlarged as at Hi2 engages with a cooperating head ltt of an adjustable contact screw its threaded into the lowermost portion of the ship per lever M. Whenever the protection mechanism on the loom causes a bang-off, rods M of which there are duplicates, one for shipper lever M and the other for the opposite lever it, move forwardly to push against the heads Hi3 of the screws just above mentioned to rotate the shipper levers and the shaft 45 thereby to throw off the power and set the brake of the loom, it being understood, of course, that the loom stops much more quickly on such occasions and that the action of the brake is merely incidental to the much more rapid stopping action caused by the contact i between the daggers and frogs. The screws I94 are adjusted and locked in position by suitable lock nuts or other means for that purpose so as to knock off the loom just as quickly as is practicable once a bang-oif stop has been initiated.

Provision is made for moving the parts to a neutral position in which the power is disconnected and the brake, rather than being engaged as would normally occur at that point, is disen gaged. As illustrated in Figs. 1, 2 and each of the knock-off levers t4 and at has at the outwardly projecting stud just above the pivot or shaft 15, a manually movable, two-armed lever one of which is indicated by numeral 155, Fig. 2, and which normally, due to the additional weight of the longer end, hangs vertically in the position therein shown. This lever has a finger grip t lt at one end and a roller iii? on the pivot we at the opposite end. Roller it'l is adapted to function against the front face of the cooperating or adjacent loomside and when the lever is swung to horizontal position slightly past that position as illustrated in Fig. 9, the effect is to push the corresponding shipper lever 4 or 48, as the case may be, away from its rearmost or loom stopped position just far enough to disengage the brake, but not far enough to engage the clutch or other mechanism through which the drive from a source of power is taken to the loom parts themselves. As illustrated in Figs. 2 and 9, the lever is stopped by a projecting lug or ear itii, the parts then being in a position slightly past that corresponding to dead center so that the pressure or tendency of the mechanism to move toward the rearmost or stopping position is resisted and the lever cannot return to its inactive or vertical position until purposely tripped by the weaver or other machine operator.

As illustrated in Fig. 4, a corresponding lever i it is pivoted at i ii and carries roller H2 which bears against the front face of the loomside at the right hand end of the machine and the shipper lever is also provided with a laterally extending stop lug I 13 against which the lever i it stops when moved to a position for setting the parts in their neutral relationship.

Along with the actuation of the knock-off mechanism, the pivoted lever also functions to withdraw the hold-back or stop pawl 38 so that the fabric take-up may be manipulated by hand if desired. A link lid is connected at the pivot point it to which spring 12 is also attached, the spring being held between the opposed fork ends fit while this link is attached at the outer projecting end of the pin. The lower end of the link is connected to the pawl 38 and lifts it about its pivot 39 so that the point of the pawl is Withdrawn well away from the teeth of the ratchet wheel ill. The position shown in Fig. 1 is that occupied by the parts just above described when the loom is stopped and the brake set. in the event the brake is released as in neutral position, the movement of the shipper lever i t or it as the case may be, affects the pivoted lever 55 just enough to lift the pawl point away from the teeth, although the actual clearance is then considerably less than that illustrated in Fig. 1 since the parts do not move very far just to release the brake. However, the fabric take-up may be manipulated by the hand wheel it in either instance.

Operation Now having described one preferred form of the invention in considerable detail, the operation thereof, while it should be apparent from what has already been said, will be reviewed briefly by way of summary. Assuming that the parts are in the position of Fig. l in which the loom is knocked off, movement of either shipper lever M or 38 since they are interconnected by shaft 45, from that position to the position of Fig. 2, serves to engage the power unit with the working parts of the loom and to release the brake through the linkage at the right hand end of the loom and which is illustrated in sufiicient detail in Figs. 4 and 5. Through the link 56, the pivoted lever 55 is swung about its pivot point 56 until it assumes the position of Fig. 2 at which time the bunter 63 is pushed rearwardly under the influence of spring it and the forward end thereof drops to a position such that the shoulder 65 engages behind Y the cross pin 69, Fig. 10, and spring i2 will at that time tend to rock the opposite or rearmost end of the bunter upwardly, that movement being limited by the pivoted detent 79 which will then be in its substantially vertical position to hold the hunter downwardly so that the end thereof will not be contacted by the end of the rod 68 in the event that rod still projects since it may be affected by the center or other filling motion which 11 may not function 'normallyuntil after the first pick of filling has been laid upon restarting.

"The rod 99 will clear the ear 5H and, of course, if the reason that the loom was stopped involved failure of warp thread, the repairing of'thatif-ailure will have resulted in return of the detent 84 to its normal or non-active position so that the point'thereof will not be engaged by cam 592 which rotates as soon as the loom is started.

In the event filling is for some reason absent from the shed at the point at which the 'filling fork functions, that mechanism serves .to start in action the filling motion cycleso that instead of being withdrawn out of alignment with bunter :63 as the lay comes forwardly, the end of the rod 60 will remain outwardly thereby to engage the bunter and to push it from its normal inactive position to affect the remaining part of the mechanism. As the hunter moves forwardly it pushes the lever 55 to the position of Fig. l whereupon the cam and lifting action of the curved surfaces 1'! and '18 aiiect the cross bar -68 in such manner as to lift the reduced end '6? until the shoulder '66 clears pin 89. Then further movement of the lay in a forward direction merely pushes the entire dagger structure forwardly compressing spring "1B which incidentally assists in checking the forward movement of the lay and therefore in stopping the machine. By varying the strength of this spring 15, it is possible to regulate stopping of the loom so that the par-ts will come to rest in a particular position.

If the stopping of the loom is occasioned by failure of a warp thread, the warp stop mechanism functions to project the plunger 82 in adirection to move detent-84 so thatthe point thereof will enter the pathway of rotating cam 92. As the parts make contact the rod 90 will be pushed forwardly engaging ear 9| of the lever 55 and swinging it to position for drawing the knock-01f mechanism rea-rwardly thereby to stop the loom as above explained. 'By adjusting the cam 82 as described, it is possibleto cause the loom to stop in any desired position upon warp failure.

The levers I05 and I I0 may be employed at any time when the loom is stopped for moving the knock-off mechanism throughout a slight angular extent sufficient for releasing the brake, but not to an extent which would be required for re engaging the power. These levers will drop to their inactive position as the loom is again started, although they may be manually returned to inactive position at any time.

While one embodiment of the invention has been disclosed, it is to be understood that the inventive concept may be carried out in a number of ways. This application is, therefore, not to be limited to theprecise details described, but is intended to cover all variations and modifications thereof falling within the spirit of the invention and the scope of the claims.

We claim.

1. In a stop motion for a loom having'a driving motor and a brake, a knock-off means movable to and from positions for controlling said motor and brake to start and stop the loom, a pivoted lever and a connecting means therefrom to said knock-off means, a means engageable with said pivoted lever and operable upon indication of filling failure for moving it to a position for actuatin the knock-off means to stop the loom, and another means operable upon a warp failure and engageable with said pivoted lever for similarly 12 moving it to activate the knock-"01f means and stop theloom.

2. In a stop motion for a loom having a driving "motor and a brake, a knock-off means movable to and from positions for controlling said motor and brake to start and stop the loom, a pivoted lever adjacent said knock-off means and a link connecting said lever to said knock-off means thereby to impart movements from the one to the other, a means operable upon indication of filling failure and comprising a normally inactive member movable upon indication of the filling failure for moving said pivoted 'lever to 'an extreme position thereby to actuate the said knock-cit means for stopping the loom, and a second means comprising a "normally inactive member functioning upon indication of a 'warp failure and engageable with said pivoted "lever for similarly moving it to actuate the knock-off lever and thereby to stop the loom.

3. In a stop motion for a loom having a driving motor and a brake, a knoc'k-off lever movable to and from positions for controlling said motor and brake to start and stop the loom-and an interconnecting linkage from said knock-01f lever to the said motor and brake, a lever pivoted adjacent said knock-on lever and a link interconnecting said lever with the knock-elf lever whereby movements of the one are imparted to the other, a normally inactive means comprising 'a reciprocable member releasably engageable with :a portion of said pivoted lever and movable upon indication of 'a filling failure to move said pivoted lever throughout a predetermined anguuar extent sufficient for swinging the interconnected knock-off lever to one of its extreme positions for stopping the loom, and a second means operable upon indication of a warp thread failure and comprising a reciprocable member independently engageable with the said pivoted lever and means functioning only upon the indication of a warp failure for moving said second means throughout an extent sufficient 'for engaging the said pivoted lever and swinging it .to a position such that by means of the interconnection between that lever and the knock-off lever, the latter is moved to a position for stopping the loom.

4. In a stop motion for a'loom havinga driving .motor and a brake, a knock-off means movable to and from positions for controlling said motor and brake to start and stop the loom, a lever pivotedadjacent said knock-off means and a link interconnecting said lever with the knock-off means, and a normally inactive member engage- .able with said pivoted lever and operable upon an indication of filling failure for moving the lever to a position for actuating the knock-off means to .stopthe loom.

5. In a stop motion for a loom having a mov 'ing lay, a driving motor and a brake, a knockoff means movable to and from positions for controlling said motor and brake to start and stop the loom, a lever pivoted adjacent said .knock-ofi means and a link interconnecting said lever and knock-off means whereby movements .of the oneare imparted to the other, a normally inactive reciprocable member releasably engageable with a portion of said pivoted lever and movable throughout an extent suflicient for swinging said lever to a position for moving the knock-off means to its extreme, loom-stopping position, said normally inactive member being further so constructed as to be disengaged from said pivoted lever and to move relatively thereto without corresponding movement of the lever, thereby to permit of more extended movement of the member than of the lever, said member being actuated for moving the lever upon filling failure and to an extent governed by the moving lay of the loom.

6. In a stop motion for a loom having a driving motor and a brake, a knock-off means movable to and from positions for controlling said motor and brake to start and stop the loom, a lever pivoted adjacent said knock-off means and a link interconnecting said lever and knock-off means whereby movements of the one are imparted to the other, said lever having one arm thereof forked, a normally inactive reciprocable member extending through the forked arm of said lever, a cross member between the said forked portion of the lever upon which the reciprocable member rests, said reciprocable member having a shouldered, offset part which seats against said cross member, but which may be disconnected therefrom after the parts have been moved to an extent sufficient for knocking off the loom, said reciprocable member thereafter being movable to an additional extent without effect upon the said pivoted lever or knock-off means.

7. In a stop motion for a loom having a driving motor and a brake, a filling sensing means having a part movable to indicate filling failure, a knockoff means movable to and from positions for controlling said motor and brake to start and stop the loom, a lever pivoted adjacent said knock-off means and a link interconnecting said lever and knock-on means whereby movements of the one are imparted to the other, said lever having one arm thereof forked, a normally inactive bunter having one end engageable with said movable part of the sensing means upon indication thereby of a filling failure and its other end passed through said forked end of the lever, a cross pin passing through said forked arm and positioned to support that end of said hunter which passes through the forked arm, a shouldered offset at that end of the bunter, said shoulder engaging against said cross pin and a spring between said first mentioned portion of the hunter and the forked arm of the lever tending to maintain the parts in such position that the shouldered offset end remains in engagement with the cross pin.

8. In a stop motion for a loom having a driving motor and a brake, a filling sensing means having a part movable to indicate filling failure, a knockoff means movable to and from positions for controlling said motor and brake to start and stop the loom, a lever pivoted adjacent said knock-off means and a link interconnecting said lever and knock-off means whereby movements of the one are imparted to the other, said lever having one arm thereof forked, a normally inactive bunter having one end engageable with said movable part of the sensing means upon indication thereby of a filling failure and its other end passed through said forked end of the lever, a cross pin passing through said forked arm and positioned to support that end of said hunter which passes through the forked arm, a, shouldered offset at that end of the hunter, said shoulder engaging against said cross pin and a spring between said first mentioned portion of the hunter and the forked arm of the lever tending to maintain the parts in such position that the shouldered oifset end remains in engagement with the cross pin, a spring tensioned to urge the first mentioned end of the bunter into alignment with that part of the filling sensing means with which it engages upon failure of filling, and a stop means for limiting movement of the hunter under the infiuence of said spring.

9. In a stop motion for a loom having a driving motor and a brake, a filling sensing means having a part movable to indicate filling failure, a knockoff means movable to and from positions for controlling said motor and brake to start and stop the loom, a lever pivoted adjacent said knock-off means and a link interconnecting said lever and knock-01f means whereby movements of the one are imparted to the other, said lever having one arm thereof forked, a normally inactive hunter having one end engageable with said movable part of the sensing means upon indication thereby of a filling failure and its other end passed through said forked end of the lever, a cross pin passing through said forked arm and positioned to support that end of said hunter which passes through the forked arm, a shouldered offset at that end of the bunter, said shoulder engaging against said cross pin and a spring between said first mentioned portion of the hunter and the forked arm of the lever tending to maintain the parts in such position that the shouldered offset end remains in engagement with the cross pin, a spring tensioned to urge the first mentioned end of the hunter into alignment with that part of the filling sensing means with which it engages upon failure of filling, and a stop means for limiting movement of the hunter under the influence of said spring, and a detent movable to and from a position above the said first mentioned end of the hunter and adapted, when in vertical position, to hold the hunter out of a position to be engaged by the filling stop motion, said detent being movable to a position in which it has no efiect upon the position of the hunter.

10. In a stop motion for a loom having a driving motor and a brake, a knock-off means movable to and from positions for controlling said motor and brake to start and stop the loom, a lever pivoted adjacent said knock-off means and a link interconnecting said lever and knock-off means whereby movements of the one are imparted to the other, said lever having one arm thereof forked, a normally inactive reciprocable member extending through the forked arm of said lever, a cross member between the said forked portion of the lever upon which the reciprocable member rests, said reciprocable member having a shouldered, offset part which seats against said cross member, but which may be disconnected therefrom after the parts have been moved to an extent sufficient for knocking off the loom, said reciprocable member thereafter being movable to an additional extent without effect upon the said pivoted lever or knock-off means, and means for effecting disengagement between said shouldered offset end of the reciprocable member and the cross member which comprises a laterally directed abutment fixed to the adjacent end of the reciprocable member and inclined, curved, camlike, lifting surfaces against which said abutment bears and by which the end of the member is raised to clear the shoulder and cross member as the pivoted lever is revolved throughout a predetermined angular extent.

11. In a stop motion for a loom having a driving motor and a brake, a knock-off means movable to and from positions for controlling said motor and brake to start and stop the loom, a warp stop mechanism actuable upon detecting a warp thread failure, and means functioning to convey indications of warp threadfailure through to said knock-on means which comprises a cam ,fixed to a-constantly rotating part of the loom, a rod extending from a position adjacent the cam to a point for effecting movement of said knock oii means, a movable detent forming a part of said rod adjacent the cam and means effective upon failure of a warp thread for moving the said detent into the pathway of the cam.

12. In a stop motion for a loom having a driving motorand a brake, a knock-off means movable to and from positions for controlling said motor and brake -.to start and stop the loom, a warp stop mechanism actuable .upon detecting a warp thread failure, and means functioning to convey indications of warp thread failure through to said knock-off means which comprises a cam adjustably fixed to rotate with the loom crank shaft, a rod extending from a position adjacent the senate a point for effecting movement of said knock-01f means, a movable detent forming a part of said rod adjacent the cam and means effective upon failure of a warp thread for moving'the said detent into the pathway of the cam.

13. In a stop motion for aloom having a crank shaft a driving motor and a brake, a knock-off means movable to and from positions for controlling said motor and brake to start and stop the loom, a warp stop mechanism actuable upon detecting a warp thread failure, and means functioning to convey indications of warp thread failure through to said knock-off means which comprises a cam fixed to rotate With the loom crank shaft, a rod extending from a position adjacent the cam to a point of effecting movement of said knock-off means, a pivoted detent at the end of said rod adjacent the cam and means eiiective upon failure of a warp thread for swinging the said detent into the pathway of the cam.

14. In a stop motion for a loom having a constantly rotating part, a driving motor and a brake, a knock-off means movable to and from positions for controlling said motor and brake to start and stop the loom, a pivoted lever adjacent said knock-off means and a link connecting said lever to said knock-off means thereby to impart movements from the one to the other, a means operable upon indication of filling failure and comprising a normally inactive member movable upon indication of filling failure for moving said pivoted lever to an extreme position thereby to actuate the said knock-off means for stopping the loom, and a second means comprising a cam fixed to said constantly rotating part of the loom, a

rod extending from a position adjacent the cam to a point adjacent the said pivoted lever, a lateral projection on said lever aligned with the end of said rod, armovable detent forming a part of said rod at the cam end thereof, and means affecting said detent in response to indications of warp thread failurefor moving it into the pathway of said cam.

15.. In a stop motion for looms of the type having a driving motor and a brake and a control means .adapted to be set at three different positions, in the first of which said motor maybe interconnected to the loom for driving it with the brake released, in the second of which the motor is disconnected and the brake engaged, and in a third and neutral position in which the brake is disengaged with the motor disconnected, a knockoff means and linkage therefrom to thecontrol means and a manually set member for releasably retainingthe knock-off means in the third 16 position to maintain the control means in its neutral position.

16. In a stop motion for looms of the type having a driving motor and a brake and a control means adapted .to be set at three different positions, in the first of which said motor may be interconnected to the loom for driving it with the brake released, in the second of which the motor is disconnected and the brake engaged, and in a third and neutral position .in which the brake is disengaged with the motor disconnected, a knockoff means and linkage therefrom to the control means, a pivoted lever and a link connecting said lever to said knock-01f means, normally inactive reciprocable means each of which acts upon said lever independently of the other, one in response to indications of filling failure .and the other in response to indications of warp failure, for stopping the loom, ,and a manually set member for releasably retaining the knock-off means in position .to maintain the control means in its neutral position.

,17. Mechanism as defined in claim 16, wherein said manually set member comprises a lever pivoted to said knock-off means, an antifriction roller at one end of said lever in position to bear against an adjacent part of the loom when the lever is moved to a position to retain the knockoff and control means inneutral position, a stop for limiting movement of the lever to a point slightly past dead center position, the end of the lever opposite the end at which the roller is mounted being heavier so as to maintain the entire lever and roller assembly inactive once it has been tripped.

18. In a stop motion for a loom having a driving motor and a brake, a knock-off .means movable to and from positions for controlling said motor and brake. to start and stop the loom, means functioning in response to failure of filling thread for moving said knock-off means to stop the loom, said means including a lay carried means, a normally inactive element moved by said lay carried means, and a resilient means forming a part of said means functioning in response to failure of filling thread and biasing that said means in a direction to resist the beat up motion of the lay and effective upon knock-off, to retard the motion of the loom.

19. In a stop motion for a loom having a driving motor and a brake, a knock-01f means movable to and from positions for controlling said motor and brake to start and stopthe loom, means functioning in response to failure of filling thread for moving saidknock-oif means to stop the loom, said means including a lay carried means, a pivoted lever and anormally inactive bunter movable upon contact with said lay carried means, and a loaded spring effective between said bunter and pivoted lever functioning to bias the bunter in a direction to resist the beat up motion of the lay and thereby to assist in braking the loom.

FLORENCE F. DONOGHUE. HARRISON N. TI-IIBAUIE.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,503,524 Wells Aug. 5, 1924 1,566,249 Hoeber Dec. 15, 1925 1,567,511 Johnson Dec. ,29, 1925 2,365,044 Blouin Dec. 12, 19.44 2,493,104 Brown Jan. .3, 1950 2,546,833 Pfarrwaller Mar. 27, 1951 

